Table of Contents


Vocabulary


Grains:A particle of mineral or other rock that gives a rock its texture.
Texture:The look and feel of a rock's surface determined by the size, shape and pattern of a rock's grain.
Igneous rock:A type of rock that forms from the cooling of molten rock at or below the surface.
Sedimentary rock:A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together.
Metamorphic rock:A type of rock that forms from an existing rock that is changed by heat,pressure,or chemical reactions.

Outline


  • How geologist classify rocks
    • color
    • texture
  • Texture
    • look
    • feel
    • grain size
    • grain shape
    • grain pattern
    • no visible grain
  • Mineral composition
    • crystals
  • Origin
    • igneous
    • sedimentary
    • metamorphic